Because they know that if you had graduated, you would have, at every turn, mentioned the name and date of your degree, instead!
Eh? Would you? I have two degrees and I never mentioned exactly what they are on my CVs, literally just like above - "2010-2014 Computer Science at University X". I've reviewed countless CVs when I was a hiring manager for a few years too, and I don't really recall if people wrote down what they got, nor was it ever relevant for any position outside of intern ones.
In my country “Computer Science” would be your degree. Your graduation date also isn’t mentioned, just the year.